Coal or rock drill



(No Model.)

J. L. 8.1 T. H'. WILLIAMS.

GOAL 0R ROCK DRILL. No. 408,867. Patented Aug'. 13, 1889.

WITNESSES MM M 77'52.

df A TToRNEY UNITED STATES PATENT OFFICE.

JOHN LLOYD VILLIAMS AND COAL OR ROCK DRILL.

SPECIFICATION forming part of Letters Patent No. 408,867, dated August 13, 1889. Application filed April 27, 1889. Serial No. 308,871. (No model.)

.To all whom, t may concern:

Be it known that we, JOHN LLOYD VIL- LIAMs and THOMAS HENRY WILLIAMS, both of Shenandoah, Schuylkill county, State of 5 Pennsylvania, citizens of the United States,

have invented certain new and useful Improvements in Coal or Rock Drills, of which the following is a full, clear, and exact description, reference being had tothe accom- Io panying drawings, forming part of this specification, and in which- Figure l is a side elevation of a drill containing our invention. Fig. 2 is a vertical central section of the operative parts on line I5 :c o: of Fig. l. Fig. 3 is a front elevation of said operative parts. Fig. 4 is a lateral crosssection on line e' e, Fig. l; and Fig. is aplan of the gear which is feathered to and operates to rotate the drill-spindle, shown in cross- 2o section, and the drill-tool carried thereby.

Our present invention relates to cert-ain improvements upon the coal or rock drill for.

which Letters Patent No. 357,748 were granted to John Lloyd Williams on February 15,1887;

2 5 and our invention consists in the several parts and devices of a drilling-machine and their combinations therein, hereinafter particularly described, and asmore particularly rccited in the claims.

3o A is the stock or supporting-bar of the drill, having at its free end the series of teeth shown, to be forced to and held against the side of a recess out in the bed of coal or rock, as shown, by means of a wedge A piv- 3 5 otally jointed to and carried by a brace-rod A2, the opposite end of said rod being detachably and adjustably seated in a slot in a lug A3, near the upper end of said bar, by

means of jam-nuts, as shown, working above and below said lug on a threaded portion of the rod. The drilloperating mechanism, supported by the bar and brace-rod, is thus mounted in position for drilling. These described devices constitute a part of the invention set forth in the Letters Patent hereinbefore referred to. K

XVe mount the drill-operating mechanism upon the supporting-bar by means of a screwbolt A4, which passes through a suitable aperture a in the upper end of the bar to an d into a threaded aperture or recess b in the frame B of said drill mechanism, so that the bar is thus united pivotally to the frame at this point; and we provide a bolt A5 set in lug-piece A3, which bolt reaches through an aperture in and pivotally unites said lug to the bar A, and which bolt is adapted in length to extend through a laterally-extending slot b in a lug b2 on said frame B. By means of these devices the drill-frame B iso given a lateral adjustment on'the supporting-bar, and the brace-rod is given a similar adjustment on said rod, while the parts are held rigidly and effectively in their adjusted positions by means of the screw-bolt AAt and a nut a', working to the face of the lug 192011 the threaded end of the bolt A5. The degree of adjustability of the frame B on the rod A by means of the described devices depends upon the length of the slot b in the lug b2 on 7o the frame, and when this slot is given considerable length it may be preferably curved somewhat for obvious reasons, as shown.

Ve find that by the means described the effective and useful adjustment of the drillframe on the supporting-bar for the purposes intended is secured, and a desirable adjustability of the rod A2 on said bar is obtained.

C is the combined drill-spindle and feedscrew, having a chuck c at its lowerpend for 8o attaching the drilltool C and threaded throughout its length, as shown. The screw C has bearings in plane-faced boxes D D onv the frame B, in which it is rotatable to effect the rotation of the tool C in drilling.

E is the feed-nut, which is intern ally threaded to correspond to the thread on spindle C, and which is seated in one of the boxes, preferablythe upper one D, upon and interposed between said spindle O and saidbox, as shown. 9o The nut E is provided with the hand-wheel E', and it also preferably has the external annular groove e, constituting its bearing in its box, and by which it is held from longitudinal displacement therein. The box D af- 9 5 fords a loose bearing for the nut E, which is preferably accomplished by hinging the upper half d to the lower half d', which is carried by and may be integral with the frame B, as shown, and holding the two halves together by a pin d2, passed through a staple d, which is fixed in thc lower half and exA IOO tends through and above a slot d'1 in the free to run the spindle bacluvard to remove the end of the upper half, as shown. A circular drillwtool from its hole in the coal or rock, or leaf-spring di' is desirably placed about the to change the tool, by entirely loosening the 7o nut E within its groove-bearing e, and thus sectional nut in its seatin the box, the thread interposed between the nut and the box-sur on the sections may be wholly disengaged faces and operating to force the box sections thereby from the thread on the spindle and apart, and thus ease the bearing on the nut. the spindle be drawn backward freely through A set-screw E2 works in an aperture in the the nut without rotation. 75 box, and is adapted to iinpinge upon the nut Vhat we claim as our invent-iemand desire io E or its encircling spring, and thus force the to secure by Letters Patent, is-

nut tightly against the opposite box-face and l. ln a drilling-machine, the combination, hold it more or less rigidly in the box, dependwith the frame carrying the drill-operatin g ing upon the extent to which said set-screw is mechanism and provided at one end with a 8o turned down upon the nut. lug having therein a long lateral slot, ot' a It is evident that by means of the described supporting-bar pivotally bolted to said frame devices, when the spindle C is being rotated at the opposite end thereof, a lug-piece proin operating the drilltool, the feed-niit may vided with a bolt extending through said bar be permitted to rotate with said spindle by and the said lateral slot in t-lie frame, a nut 85 loosening the set-screw E2 and allowing the on said bolt to hold the saine in said slot, a

zo nut to turn freely in the box l), while at the brace-rod seated. at one end in said lug-piece, saine time the operator may readily and con and a wedge carried by said rod at its oppoveniently control the feed by grasping the site end, substantially as and for the purpose hand-wheel E at any time and holding it set forth. 9o

still or rotating it in its bearing, when the ro- 2. ln a drilling-machine, the combination,

2 5 tation of the spindle C as it operates the drill with the supportingbar and frame carried will cause it to feed forward on its threaded thereby, of a rotatabledrillspiiidle externally bearing inthe nut; or the set-screw maybe threaded throughout its length and having turned down hard and the spindle will feed bearin iii boxes on said frame, and a feed- 9 5 continuously during its rotation a distance nut on said threaded spindle at. and having 3o equal to the full pitch of the thread on the loose bearing in one of said boxes, together same and feedaiut; or the setserew may be with a set-serew working in said. box and somewhat tightened, and while the nut when adapted to impiiige upon said nut at its bearnot manipulated may still rotate with spining therein, substantially as and for the purioo dle (l, yet when .grasped by the operator by pose set forth.

its hand-wheel the feed maybe controlled by 3. ln a drillingsniachine, the combination, the operator and effected to more or less of with the supporting-bar and 'frame carried the pitch of the thread on the spindle. thereby, of arotatabledrill-spindle externally XVe iind it preferable to construct both the threaded throughout its length and having 105 boxes l) and D withV their upper halves bearings in boxes on said frame, a feed-nut 4o hinged, as described, and to form the pin d? on said threaded spindle at one of said boxes,

of such a length that it will be common to and provided with an. external. circumferenbotli boxes in fastening the upper halves tial groove at which it has bearing around thereof bythe described staples. The pin di! said spindle in said box, a loose tap or section 11o is desirably fastened to the frame by a chain of said box, a leaf-spring on said nut in said d, as shown. By these means the spindle bearing-groove thereiinanda set-screw work and its operating mechanism may be readily ing in said loose box and adapted to impinge unseated and replaced in the boxes. upon said spring and nut at its bearing To effect the rotation of the spindle C, we therein, substantially as and for the purpose i i 5 preferably employ a spur-gear e', whichV is set forth. 5o mounted thereon within the frame B between l. In a drilliiigmachine, the combination, the boxes D l'),andwliieliliasa hub c2 reaehwith the supi'iorting-bar and frame carrei'l ing to and abutting against the lower face of thereby, of a rotatable drill-spndle externally the feednut, as shown. The gear e has a threaded throughout its length and having izo feather' or feathers ci", which take in a groove bearings iii boxes on said frame, a feed-nut or grooves if", extendinglongitudinally of the composed of longitudinal sections mounted spindle, so that while the rotation of the gear on said threaded spindle at one of said boxes, operates to rotate the spindle the spindle may and provided with an external circumferenmove freely through the gear as it is fed fortial groove at which it has bearing around 125 ward or backward. The gear e is driven by said spindle in said box, a loose tap or section oo a pinion ef on a shaft e, having bearings in of said box, and a setscrew working in said the frame B and operated by cranks e" on its loose box and adapted to impinge upon said outer ends. n nut at its bearing therein, substantially as The feedaiut E and its haiid-wheel may be and for the purpose set forth. ige split into sections longitudinally, as shown. In, a drilliiig-machine, the combination,

When mounted upon the barGin the box l), with the supporting-bar and frame carried these sections will be held together bythe thereby, ot' a rotatabledrill-spindle externally box and set-screw El, and when it is desired threaded throughout its length, a feednuton said threaded spindle, provided With an external circumferential groove, boxes on said frame in which said spindle and its feed-nut have bearings, each said box having a section thereof iixed on said frame and a section hinged at one end and detachably attachable at its opposite end to said fixed section, and a set-screw Working in the box in Which said feed-nut has bearing and adapted to iinpinge upon said nut therein, substantially as and for the purpose set forth.

6. In a drilling-machine, the combination, With the supporting-bar and frame carried thereby, of a drill-spindle externally threaded throughout its length and provided with an external longitudinally-extended groove or grooves, a feed-nut on said spindle, provided with an external circumferential groove, boxes on said frame in which said spindle and its nut have the described bearings, a setscreW Working in the boX, in Which said nut has bearing, and adapted to iinpinge thereon therein, a gear on said spindle and feathered to said groove or grooves therein, and a piliion engaging said gear and mounted on a shaft having bearings in said frame and proi vided with actuating-cranks, substantially as and for the purpose set forth.

JOHN WHoMsLEv, DAvm EVANS. 

